/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.form;

import java.util.Map;

import org.activiti.engine.ActivitiIllegalArgumentException;
import org.flowable.engine.form.AbstractFormType;

/**
 * @author Tom Baeyens
 */
public class EnumFormType extends AbstractFormType {

    private static final long serialVersionUID = 1L;

    protected Map<String, String> values;

    public EnumFormType(Map<String, String> values) {
        this.values = values;
    }

    @Override
    public String getName() {
        return "enum";
    }

    @Override
    public Object getInformation(String key) {
        if ("values".equals(key)) {
            return values;
        }
        return null;
    }

    @Override
    public Object convertFormValueToModelValue(String propertyValue) {
        validateValue(propertyValue);
        return propertyValue;
    }

    @Override
    public String convertModelValueToFormValue(Object modelValue) {
        if (modelValue != null) {
            if (!(modelValue instanceof String)) {
                throw new ActivitiIllegalArgumentException("Model value should be a String");
            }
            validateValue((String) modelValue);
        }
        return (String) modelValue;
    }

    protected void validateValue(String value) {
        if (value != null) {
            if (values != null && !values.containsKey(value)) {
                throw new ActivitiIllegalArgumentException("Invalid value for enum form property: " + value);
            }
        }
    }

}
